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تاریخ::
لیخنسنجی
Under ideal condi- tions, the lichenometric dating curves produced by both methods permit the age estimation of a thallus of unknown antiquity, but there are a number of qualifi- cations.
Different metrical and statistical devices have been used to collect lichenometric data, including the deter- mination of the longest axis present (Anderson & Sollid, 1971; Bickerton & Matthews, 1992; Bornfeldt &
Lichenometric dating curves are slightly parabolic, with a decreasing growth rate as the thallus ages.
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